html,
body {
    height: 100%;
    background-image: url('../images/register.jpg');
}

body {
    display: -ms-flexbox;
    display: flex;
    -ms-flex-align: center;
    align-items: center;
    padding-top: 40px;
    padding-bottom: 40px;
    background-color: #f5f5f5;
}

*{
    margin: 0px;
    padding: 0px;
    margin: auto;
}

#btn-ok{
    margin-right: 120px;
}

.form-group.form-check{
    margin-top: 10px;
}

.card { background-color: rgba(245, 245, 245, 0.5); }